describe('onRemove', function () {
    /////////////////////////////
    // SETUP FOR EACH TEST
    /////////////////////////////
    var map, div;

    beforeEach(function () {
        div = document.createElement('div');
        div.style.width = '200px';
        div.style.height = '200px';
        document.body.appendChild(div);

        map = L.map(div, {maxZoom: 18, trackResize: false});

        map.fitBounds(new L.LatLngBounds([
            [1, 1],
            [2, 2]
        ]));
    });

    afterEach(function () {
        map.remove();
        document.body.removeChild(div);

        map = div = null;
    });

    /////////////////////////////
    // TESTS
    /////////////////////////////
    it('removes the shown coverage polygon', function () {

        var group = new L.MarkerClusterGroup();
        var marker = new L.Marker([1.5, 1.5]);
        var marker2 = new L.Marker([1.5, 1.5]);
        var marker3 = new L.Marker([1.5, 1.5]);

        group.addLayer(marker);
        group.addLayer(marker2);
        group.addLayer(marker3);

        map.addLayer(group);

        group._showCoverage({layer: group._topClusterLevel});

        expect(group._shownPolygon).to.not.be(null);

        map.removeLayer(group);

        expect(group._shownPolygon).to.be(null);
    });
});